The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 27, 2017
Filed:
Dec. 05, 2011
Zhiyong Zhai, Solon, OH (US);
Michael Andrew Morich, Mentor, OH (US);
Paul Royston Harvey, Best, NL;
Miha Fuderer, Eindhoven, NL;
Zhiyong Zhai, Solon, OH (US);
Michael Andrew Morich, Mentor, OH (US);
Paul Royston Harvey, Best, NL;
Miha Fuderer, Eindhoven, NL;
KONINKLIJKE PHILIPS ELECTRONICS N.V., Eindhoven, NL;
Abstract
Coil elements () generate a Bexcitation field in an examination region (), which Bexcitation field is distorted by patient loading (e.g., wavelength effects). Passive shimming elements () are disposed between the coil elements and the subject in order to improve the Bfield uniformity. In one embodiment, passive shimming elements include one or more dielectric rods () disposed below the subject which generate no substantial MR proton signal and which have a permittivity of at least 100 and preferably greater than 500. In another embodiment, tubes () adjacent each coil element are supplied with a dielectric liquid, a thickness of the dielectric liquid between the coil element and the subject adjusting a phase of the Bfield generated by the coil element. Active Bshimming may be combined with passive shimming elements () to effect an improved RF field homogeneity result.